well, none of these are really implemented (yet) but here you go<p>SW Only<p>1) An all-in-one transport app. You'd have a single credit wallet you could re-charge on a monthly/weekly/as-needed basis. You set in your profile for how long you are willing to wait for a ride(lets say +/- 15min), and how far are you willing to walk from your current location(lets say r500m) + other criteria if you please(like ferraries-only:). Rates could be something like few cents/km for "civilian" drivers(standard car-sharing - could be problematic depending on the legislature/generated profit for the driver), few bucks/km for cabs, pub transport based on routes/times and - dynamic pub transport routes per km as well. Lets say there is a after-work beer with colleagues planned so you can't drive to work by your self. During breakfast you just choose a destination(predefined for freq. places), desired time and a "hitchhiker sign". All drivers doing the same/similar route(with criteria compatible with yours) would be notified .. a few "accept" clicks away/maybe a quick look at the drivers profile(badges/km driven/reviews etc) and your off to work. No drivers available? Your app would show you all public transport possibilities(color coded based on compatibility with your criteria) + cabs in your area - few clicks away and you're set(either buying a ticket or ordering a cab). Double-validation for payments based on transport type - no more waiting on a bus stop for 2 hours watching 100's of driver-only empty cars going your direction + a public API would mean that bus companies could also use small 6-8 passenger buses and dynamically create new/amend existing routes based on the demand(200 people heading to a business park across town(C) from destination A, 100 from B to D(which is near C) between 0800 - 0900 > change route via B .. if time intervals are met(like 1h from A - C) ) ++ all the data flowing your direction could also be used as a waze alternative for even better routing +++ you could profit by selling api data/on % from commercial transport partners) + have awards for car-share folks like free oil/filter changes after 10k km/free coffee after 20km between 2200 - 0600 etc..). If you are in EU, these projects are highly welcomed..<p>2) We need a distributed decentralized(p2p), no-authority write once read many storage solution for "our civilizations data" like news/general knowledge. It has to support versioning, encryption, deduplication, store synapses between relevant data, be self-healing, layered, nodes monitoring/promoting(demoting)/caranteening each other if needed, role-based - build on premise that all* of the nodes are/can become malicious actors(..). Everyone should be able to run a node on his nas @home/mobile device, assign roles to his devices etc .. general storage for all things public.. + it should support anonymous document uploads(lets say an indenpended journalist from syria wants to get his/her story published / someone working in a big-co comes across some very interesting public-interest documents he;d like to publish and doesn't trust honey-pot assange/media) - all big problems on their own .. regardless of the client app using the data(if you are running a auto-moto/pro-(enter political party) website, you may apply as much filtering as you wish), the user should still be able to get/contribute to the "publicly-generated" synaptic nw of a news story as stored on the backend + this is the bare minimum for other systems we desperately need to reform(the "no-trust" premise of it) so a good way to dive into this problematic<p>3) services on top of 2) .. and there are many ..<p>4) DNS, routing, ssl/alternative, smtp replacement! .. + ton of things you could do to make this world a better place.. please just don;t waste it on another twitter app<p>5) Clouds are here to stay, what has to change is the way we look at and work with data + connected with 2) + a few old concepts ms thought about pioneering a few years back, maybe its time for - yet another - linux distribution, combining best of today's storage array internals, embedded systems, containers/vm technology and security(..). In combination with some dedicated (hopefully usb-sized) hw .. could be a interesting time-waster<p>SW + HW<p>1) Easy-to-use/build RF-net kits for low-bandwidth applications(irc/messaging fe) - pick a protocol/design your own, design a hierarchical topology of clients, ap's, retransmitters, keep an eye on per-country rf encryption restrictions and hope you'll never have to use it as your primary means of communication(eg no "accidents" on our main optic backbone)<p>2) HW keys to your cloud data/apps - turning your PC into an accessory/treating it the same like a cloud service provider with computing/storage services available based on the pc-os setup .. maybe the x-server architecture could finally become applauded ..<p>"HW" Only<p>1) The idea of public work-places is great! soldering sets, measuring gear, 3d printers, tools for lease, benches for alu/wood work etc - would probably be a hit anywhere(+ that equipment costs too much/takes years to gather at home.. ) - there is a hobbyist in most of us + in combination with a caffee/"fun" area/library and city funding, you may even get into some green numbers<p>2) In combination with 1) - electronics tuning shop - if you like to get your hands dirty(building hw slider switches into phones/nbs, custom cases/hw customization - router fw's etc) - you could get some traction if you;d presented your self as something underground/anti-establishment .. these days..<p>3) bio and localized farming - huge opportunities, really bad business models(we;re talking about real bio producers struggling with the rising regulatory pressure lobbied by the big guys, not the so-called bio farmers selling out to those big-co's) - monthly payments with 2x/4x a month "basket" deliveries of seasonal food to your doorstep with some it tech in the mixture + insurance coverage for the farmer +++ .. ok I'm hungry - sry for this half-baked not thought through / naive / unfeasible list and good luck ..